The chemical equation for the reaction of carbon monoxide with hydrogen is given below. $\text{CO}(g) + 3\text{H}_2(g) \rightleftharpoons \text{CH}_4(g) + \text{H}_2\text{O}(g)$ What are the units of $K_p$ for this reaction?
- A$\text{kPa}$
- B$\text{kPa}^{-1}$
- C$\text{kPa}^2$
- D$\text{kPa}^{-2}$